Apparatus and method for endovascular device guiding and positioning using physiological parameters
First Claim
1. An endovascular device, comprising:
- an elongate body with a proximal end and a distal end;
a non-imaging ultrasound transducer on the elongate body;
an endovascular electrogram lead on the elongate body in a position that, when the endovascular device is in the vasculature, the endovascular electrogram lead is in contact with blood;
a processor configured to receive and process a signal from the non-imaging ultrasound transducer and a signal from the endovascular electrogram lead; and
a memory for storing instructions which, when executed by the processor, causes the processor to;
calculate one or more blood flow features extracted from the non-imaging ultrasound signal, wherein the one or more blood flow features includes a ratio of a blood flow velocity away from the ultrasound transducer and a blood flow velocity towards the ultrasound transducer;
calculate one or more electrogram features extracted from the electrogram signal, wherein the one or more electrogram features includes a P-wave amplitude; and
determine a position of the elongate body within the vasculature based on the calculated one or more blood flow features and one or more electrogram features.
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Abstract
An endovascular access and guidance system has an elongate body with a proximal end and a distal end; a non-imaging ultrasound transducer on the elongate body configured to provide in vivo non-image based ultrasound information of the vasculature of the patient; an endovascular electrogram lead on the elongate body in a position that, when the elongate body is in the vasculature, the endovascular electrogram lead electrical sensing segment provides an in vivo electrogram signal of the patient; a processor configured to receive and process a signal from the non-imaging ultrasound transducer and a signal from the endovascular electrogram lead; and an output device configured to display a result of information processed by the processor.
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Citations
52 Claims
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1. An endovascular device, comprising:
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an elongate body with a proximal end and a distal end; a non-imaging ultrasound transducer on the elongate body; an endovascular electrogram lead on the elongate body in a position that, when the endovascular device is in the vasculature, the endovascular electrogram lead is in contact with blood; a processor configured to receive and process a signal from the non-imaging ultrasound transducer and a signal from the endovascular electrogram lead; and a memory for storing instructions which, when executed by the processor, causes the processor to; calculate one or more blood flow features extracted from the non-imaging ultrasound signal, wherein the one or more blood flow features includes a ratio of a blood flow velocity away from the ultrasound transducer and a blood flow velocity towards the ultrasound transducer; calculate one or more electrogram features extracted from the electrogram signal, wherein the one or more electrogram features includes a P-wave amplitude; and determine a position of the elongate body within the vasculature based on the calculated one or more blood flow features and one or more electrogram features. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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52. An endovascular device, comprising:
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an elongate body with a proximal end and a distal end; a non-imaging ultrasound transducer on the elongate body; an endovascular electrogram lead on the elongate body in a position that, when the endovascular device is in the vasculature, the endovascular electrogram lead is in contact with blood; a processor configured to receive and process a signal from the non-imaging ultrasound transducer and a signal from the endovascular electrogram lead; and a memory for storing instructions which, when executed by the processor, causes the processor to; calculate one or more blood flow features extracted from the non-imaging ultrasound signal, wherein the one or more blood flow features includes a ratio of a blood flow power spectrum away from the ultrasound transducer and a blood flow power spectrum towards the ultrasound transducer; calculate one or more electrogram features extracted from the electrogram signal, wherein the one or more electrogram features includes a P-wave amplitude; and determine a position of the elongate body within the vasculature based on the calculated one or more blood flow features and one or more electrogram features.
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Specification